RECON: TNO occultation with 38628

Event between (38628) Huya and star GA0820:05176814 with event index number of 204277

Geocentric closest approach at 2019/07/08 09:07:41 UTC

J2000 position of star is 16:31:56.9 -06:04:25
Equinox of date position of star is 16:32:59.2 -06:06:51
Stellar brightness G=12.7, use SENSEUP=16
Star is 65 degrees from the moon. Moon is 38% illuminated.
TNO apparent brightness V=19.5

[RECON map]
TNO is 28.7 AU from the Sun and 27.9 AU from the Earth.
The TNO is moving 17.3 km/sec on the sky relative to the star, or, 3.1 arcsec/hr.
The 1-sigma error in the time of the event is 98 seconds.
The 1-sigma cross-track error in the shadow position is 1022 km.
The sky-plane scale is 20229.7 km/arcsec.

The TNO has an absolute magnitude Hv=4.8
Diameter=660.7 km assuming a 5% albedo -- 38.3 sec chord
Diameter=269.7 km assuming a 30% albedo -- 15.6 sec chord
Dynamical classification is 3:2E+6:4II
 
 
 
 
 
 

Star training set for 38628, (2019/07/08 09:08UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:36.4 -26:28:25  0.9 20.37  69
13Zet Oph      16:38:14.1 -10:36:19  2.6  4.67  67
PPM 199844     16:39:04.4 -06:34:34  6.4  1.58  67
PPM 199789     16:35:30.9 -06:10:32  8.4  0.63  66
PPM 199743     16:33:02.1 -06:12:18  9.5  0.09  65
38628          16:32:59.5 -06:06:51 12.7        65
Positions are for equinox of date

This table contains the target star visibility for the RECON network. The observing range has been set to a maximum of 5.0 sigma about the mid-time.
The median site spacing is 21.6 km RECON observability=0.7 and success probability=23.6%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kelowna 09:03:55 -16.3 AT Down 16.8 237.9 Really Low 08:55:16 - 09:12:34 2096
Summerland 09:03:55 -16.7 AT Down 17.2 237.7 Really Low 08:55:16 - 09:12:34 2077
Penticton 09:03:54 -16.7 AT Down 17.1 237.9 Really Low 08:55:15 - 09:12:33 2071
Okanagan Falls 09:03:54 -16.9 AT Down 17.2 237.9 Really Low 08:55:15 - 09:12:33 2057
Oliver 09:03:53 -17.1 AT Down 17.3 237.9 Really Low 08:55:14 - 09:12:32 2045
Anarchist Mountain Observatory 09:03:52 -17.2 AT Down 17.3 238.2 Really Low 08:55:13 - 09:12:31 2030
Oroville 09:03:52 -17.3 AT Down 17.4 238.1 Really Low 08:55:13 - 09:12:31 2025
Tonasket 09:03:51 -17.5 AT Down 17.5 238.2 Really Low 08:55:12 - 09:12:30 2008
Okanogan 09:03:51 -17.9 AT Down 17.8 238.1 Really Low 08:55:12 - 09:12:30 1984
Brewster 09:03:50 -18.2 Dark Down 18.0 238.0 Really Low 08:55:11 - 09:12:29 1966
Manson/Chelan 09:03:50 -18.4 Dark Down 18.4 237.8 Really Low 08:55:11 - 09:12:29 1954
Entiat 09:03:50 -18.7 Dark Down 18.5 237.8 Really Low 08:55:11 - 09:12:29 1938
Wenatchee 09:03:49 -18.9 Dark Down 18.7 237.8 Really Low 08:55:10 - 09:12:28 1920
Ellensburg 09:03:48 -19.4 Dark Down 19.1 237.7 Really Low 08:55:09 - 09:12:27 1891
Yakima 09:03:47 -19.8 Dark Down 19.3 237.8 Really Low 08:55:08 - 09:12:26 1859
Toppenish/White Swan 09:03:46 -19.9 Dark Down 19.3 238.0 Really Low 08:55:07 - 09:12:25 1841
Pasco 09:03:42 -19.8 Dark Down 18.6 239.1 Really Low 08:55:03 - 09:12:21 1816
Goldendale 09:03:45 -20.5 Dark Down 19.9 237.8 Really Low 08:55:06 - 09:12:24 1802
PNWRO 09:03:41 -20.0 Dark Down 18.6 239.4 Really Low 08:55:02 - 09:12:20 1794
George/Umatilla 09:03:42 -20.2 Dark Down 18.9 239.0 Really Low 08:55:03 - 09:12:21 1793
The Dalles 09:03:45 -20.8 Dark Down 20.2 237.6 Low 08:55:06 - 09:12:24 1789
Maupin 09:03:44 -21.2 Dark Down 20.4 237.8 Low 08:55:05 - 09:12:23 1755
Madras/Culver 09:03:43 -21.8 Dark Down 20.7 237.9 Low 08:55:04 - 09:12:22 1712
Sisters 09:03:43 -22.2 Dark Down 21.1 237.6 Low 08:55:04 - 09:12:22 1690
Redmond 09:03:41 -22.1 Dark Down 20.9 238.0 Low 08:55:02 - 09:12:20 1683
Bend 09:03:42 -22.3 Dark Down 21.1 237.9 Low 08:55:03 - 09:12:21 1668
Oregon Observatory 09:03:41 -22.5 Dark Down 21.3 237.9 Low 08:55:02 - 09:12:20 1655
La Pine/Gilchrist 09:03:41 -22.7 Dark Down 21.4 237.9 Low 08:55:02 - 09:12:20 1640
North Lake 09:03:38 -23.1 Dark Down 21.3 238.5 Low 08:54:59 - 09:12:17 1597
Chiloquin 09:03:38 -23.9 Dark Down 22.2 238.0 Low 08:54:59 - 09:12:17 1553
Paisley 09:03:35 -23.5 Dark Down 21.3 239.0 Low 08:54:56 - 09:12:14 1547
Klamath Falls 09:03:37 -24.2 Dark Down 22.4 238.1 Low 08:54:58 - 09:12:16 1524
Lakeview 09:03:33 -24.0 Dark Down 21.5 239.3 Low 08:54:54 - 09:12:12 1502
Tulelake 09:03:35 -24.4 Dark Down 22.3 238.5 Low 08:54:56 - 09:12:14 1497
Cedarville 09:03:31 -24.6 Dark Down 21.7 239.7 Low 08:54:52 - 09:12:10 1445
Fall River/Burney 09:03:33 -25.3 Dark Down 22.7 238.9 Low 08:54:54 - 09:12:12 1420
Susanville 09:03:29 -25.8 Dark Down 22.6 239.7 Low 08:54:50 - 09:12:08 1357
Greenville 09:03:29 -26.1 Dark Down 22.9 239.5 Low 08:54:50 - 09:12:08 1337
Gimple 09:03:29 -26.1 Dark Down 22.9 239.6 Low 08:54:50 - 09:12:08 1336
Quincy 09:03:28 -26.3 Dark Down 23.0 239.6 Low 08:54:49 - 09:12:07 1320
Portola 09:03:27 -26.3 Dark Down 22.8 240.0 Low 08:54:48 - 09:12:06 1303
Reno 09:03:24 -26.5 Dark Down 22.5 240.6 Low 08:54:45 - 09:12:03 1272
Carson City 09:03:23 -26.8 Dark Down 22.7 240.8 Low 08:54:44 - 09:12:02 1240
Gardnerville 09:03:22 -27.0 Dark Down 22.7 240.9 Low 08:54:43 - 09:12:01 1218
Yerington 09:03:21 -26.9 Dark Down 22.3 241.3 Low 08:54:42 - 09:12:00 1215
Hawthorne 09:03:18 -27.2 Dark Down 22.2 241.9 Low 08:54:39 - 09:11:57 1167
Niwot 09:02:52 -21.7 Dark Down 12.1 251.2 Really Low 08:54:13 - 09:11:31 1138
SwRI 09:02:52 -21.8 Dark Down 12.2 251.2 Really Low 08:54:13 - 09:11:31 1130
Lee Vining 09:03:18 -27.8 Dark Down 22.8 241.7 Low 08:54:39 - 09:11:57 1124
Tonopah 09:03:13 -27.3 Dark Down 21.4 243.1 Low 08:54:34 - 09:11:52 1107
Bishop 09:03:14 -28.2 Dark Down 22.6 242.5 Low 08:54:35 - 09:11:53 1061
Beatty 09:03:08 -28.3 Dark Down 21.6 243.9 Low 08:54:29 - 09:11:47 998
Lone Pine 09:03:11 -28.9 Dark Down 22.7 243.0 Low 08:54:32 - 09:11:50 988
Indian Springs 09:03:05 -28.3 Dark Down 21.0 244.8 Low 08:54:26 - 09:11:44 954
CPSLO 09:03:16 -30.7 Dark Down 25.1 241.6 Low 08:54:37 - 09:11:55 906
Henderson 09:03:01 -28.6 Dark Down 20.7 245.5 Low 08:54:22 - 09:11:40 896
Searchlight/Boulder City 09:03:00 -29.2 Dark Down 20.9 245.7 Low 08:54:21 - 09:11:39 843
Patrick 09:02:57 -28.9 Dark Down 20.2 246.5 Low 08:54:18 - 09:11:36 824
Laughlin/Bullhead City 09:02:58 -29.3 Dark Down 20.8 246.0 Low 08:54:19 - 09:11:37 811
Kingman/Dolan Springs 09:02:57 -29.2 Dark Down 20.4 246.4 Low 08:54:18 - 09:11:36 806
DCO 09:02:54 -29.0 Dark Down 19.8 247.0 Really Low 08:54:15 - 09:11:33 786
Mohave Valley 09:02:57 -29.6 Dark Down 20.9 246.1 Low 08:54:18 - 09:11:36 785
Wildwood 09:03:07 -31.4 Dark Down 24.2 243.6 Low 08:54:28 - 09:11:46 767
Lake Havasu City 09:02:55 -29.9 Dark Down 20.9 246.4 Low 08:54:16 - 09:11:34 745
Parker 09:02:55 -30.2 Dark Down 21.0 246.6 Low 08:54:16 - 09:11:34 712
Idyllwild 09:03:00 -31.3 Dark Down 23.0 245.1 Low 08:54:21 - 09:11:39 707
Blythe 09:02:54 -30.8 Dark Down 21.4 246.6 Low 08:54:15 - 09:11:33 667
Calipatria 09:02:56 -31.5 Dark Down 22.4 246.1 Low 08:54:17 - 09:11:35 633
Yuma 09:02:52 -31.7 Dark Down 21.8 246.9 Low 08:54:13 - 09:11:31 580

Azimuth is measured in degrees eastward from north. North is at an azimuth of 0, due East is at an azimuth of 90 degrees, due South is 180, and due West is 270.

Do not use the listing below for the RECON CPC 1100 telescopes. This is provided for other non-team facilities.

Star training set for 38628, (2019/07/08 09:08UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 20.37  69
13Zet Oph      16:37:09.6 -10:34:01  2.6  4.67  67
PPM 199844     16:38:01.6 -06:32:17  6.4  1.58  67
PPM 199789     16:34:28.3 -06:08:11  8.4  0.63  66
PPM 199743     16:31:59.4 -06:09:53  9.5  0.09  65
38628          16:31:56.9 -06:04:25 12.7        65
Positions are for J2000

Event circumstances last updated at 2019/06/10 22:55:20 UT

Marc W. Buie, Southwest Research Institute

RECON